Improvement in metal pulley-blocks



Winamax.'

NPETERS. PHOTO-UTHUGRAPHER, wAsHINGToN o c f tinted sam @sind @Wire GEORGE W. GREGORY, OF WATERTOWN,`NEW YORK.

' Letters Patent No. 90,525, l: i-ated May 25, 1869.

IMPROVEMENT IN' METAL P'ULLEY-BLOCKS.

'The Schedule referred to in these Letters Patent and making part of the` aai-ne.

exact description of the construction of the same,

reference being had to the accompanying drawings, making a portion' of this description, and in which like letters are used to designate like parts.

Figure l' represents a side view of the improved pulley;

Figure 2 represents the pulley with one of its sides removed;

Figure 3 represents the swivel or eye;

Figure 4 represents a view o'f one of the side frames;

Figure 5, a transverse section of the wheel or sheave; and

Figure 6, an end view of' the pulley.

a a designate twaframes of metal with open sides, for lightness, and preferably cast, and having holes, b, to receive bolts b', to holdtbe frame. together.

Each frame, at top, has a semi-cylindrical opening, c, in which lits cylindrical shank g of the Vswivel f, having at its bottomA a button, h, to prevent the removal ofthe swivel from the cylindrical opening formed by placing the sides a a together.

` The frames 4have each a large opening c, for abearing for the hub of the wheel or sheave, and 'these bearings have in them a groove, which may be packed with leather or hide, or any metal-usually used for bearings in machinery. Y

The pulley-wheel or sheave is made or cast in two parts, t i', having hubs jj,'to be packed with any suitable packing and lubricator. v

It has also oil-outlets l l, and inlet k.

The rope used onV pulleys wears away rapidly, and' to prevent this, the groove of the wheel is lined with.

sheet-lead, or any suitable material, in the following manner:

The edges of two strips of the lining 'm m are placed between the halves t' i' of the wheel, which are then screwed together by screws, rivets, or bolts, as at n. y

The lining is then turned over in the grooves of the pulley, as shown in g. 5, forming` a lead or smooth surface. l

Having secured the lining between the halves 'i i',

and packed the hub-bearings c, and'packed the hub p jj', the wheel is inserted in the frames a a,the hubs jj resting in bearings c, the swivel is placed in its opening e, and the .frames a a are then secured together by the bolts and nuts b.

Before using the pulley, oil is poured in the hub j, t-hrouglr the inlet k, and this oil, as the wheel rotates, passes out through the outlets l l, on the bearings c; and lubricates them.

` The edges d d of the frame are curled or rounded, to prevent wear on the rope.

The wheel may be lined with leather, insteadV of sheet-leader other soft metal.

Having described my invention,

What I claim, and desire to secure by Letters Patent, is-

1. A pulley-wheel, made or cast in two parts, and having secured between its 4parts sti-ips of lead, or

equivalent material, substantially as and for thepurf 4 pose described.

2. A 'pulley-wheel, having attached thereto the bearing-hubs, made hollow, and provided with inlet` specification, in' the presence of GEO. W. GREGORY.

Witnesses:

' JOHNS. HoLLINGsHnAD,

J oHN S. HoLLrNGsnnAD, Jr. 

